Filing machine



Feb. 24, 1942.

J. MEYER FILING MACHINE Filed June 29, 1940 Li: will/l1 Patented Feb. 24, 1942 PATENT OFFICE V 1 FILING MACHINE Josef Meyer, Dietikon, Switzerland Application June 29. 1940,v sesame. 343,181 In Switzerland February 24,1940

(Cl. Zip-76 6 Claims.

Filing machines are already known in which filing chain members are linked together to form an endless band or in which the files are arranged guide pulleys, one of these guide pulleys being;

displaceably mounted and under spring action in such a manner that the filing band is tensioned. It has been attempted, by means of a special construction of the means for fixing the individual files to the chain members as well as of the links and by means of guides, to obtain a steady motion of the filing band, which naturally has a considerable mass, and to prevent harmful shocks or blows from occurring at the working position. However, there are no means for preventing the alignment of the individual filing members with each other at the working position from occasionally being defective owing to filings or the like becoming jammed, and, consequently, violent jolts from occurring which may lead to the flying ofi of individual files or parts of them or to damage to the work. Consequently, in such filing machines the danger of accident is very great and the speed of working is very limited. Now the present invention provides a novel and advantageous solution.

The subject matter of the'present invention is a filing machine with an endless filing band which passes over two guidepulleys and in which file elements are strung, loosely but lying next to each other, on a steel band, which consists of at least one sheet, in such a manner that they,

form a closed filing band which runs over the two guide pulleys.

The filing machine according to the invention has various important advantages as compared with the known filing machines. In the first place, the mass of the filing band is considerably smaller and, in the-second place, it can no longer occur thatthe alignment of the individual files with each other is impaired owing to jamming of filings or the like. In this Way, the danger of accident is reduced to a minimum and a considerably greater speed of working is rendered possible. Furthermore, it is now possible to employ a very considerable number of files of difierent cross-sectional shapes and to work not, as hitherto, with only one side of the filing band. In this way, the possibility of employment of the filing machine is very considerably increased.

An example of embodiment of the subject matter of the invention is represented diagrammatically by the accompanying drawing, of which Fig. 1 is a side elevation of a filing machine;

Fig. 2 is a part of an axial section through a guide pulley of this filing machine;

Fig. 3 is a detail view of the filing band;

Fig. 4 shows an example of an arrangement of the file elements on the steel band;

Fig. 5 shows a special example of construction of the file elements; and

Figs. 6 to llshow various profiles of file elements such as may be employed on the filing machine accordingto the invention.

i denotes the lower part and 2 the upper part of the stand of the filing machine. On the lower part I there is mounted a driving motor 3 which drives, through an intermediate shaft 3', a shaft 4 which is mounted in. the lower part I. A guide pulley 5 is mounted on this shaft 4. In the upper part 2- there is provided a guide 6 in which is displaceable a carriage l which is acted upon by a compression spring 8. In this carriage I there is mounted a shaft 9 on which a further guide pulley Ill is mounted. Passing over the guide pulleys 5 and I0 is a closed filing band II which passes through a slot l3 in a work table l2. which is arranged on the lower part I. The compression spring 8 presses the carriage l, in which the shaft 9' with the guide pulley It] is mounted, upwards, that is to say away from the guide pulley 5, so that the filing band H, which runs over these two guide pulleys 5 and I0, is

tensioned. The arrangement may, as shown, be such that the guide pulleys 5 and Ill are mounted overhung on projecting ends of their shafts 4 and 9 respectively. This renders possible an easy exchange of the filing band ll. Obviously, the shafts. 4 and 9 could alsobe mounted on both sides of the guide pulleys 5 and I0 respectively, in which case it is only necessary to make provision for the ready exchange of the filing band The filing band II, which is represented on a larger scale in Fig. 3, consists of a steel band [4 and file elements l5 which are loosely strung thereon. The steel band [4 may also, as represented, be composed of aplurality of sheets Ma, Mb and Me. vided with a longitudinal slot which passes through them so that they can embrace the steel band l4 completely or they may, as represented by I5a in Fig. 5, be open on one side. On their outer side, they are provided with filing teeth which may be formed by cutting or mill- The file elements l5 may be proing. The file elements are mounted on the steel band loosely but lying next to each other, so that their mutual alignment is always ensured.

A special constructional example of a filing band is represented in Fig. 4. In this case, the steel band I4, which consists of a single sheet, is wider than the slot in the file elements i5 so that the edges of the steel band 14 lie in the file elements [5 in the inside corners of the slot whilst its arched middle part rests against the outer side of this slot. In this way, a faultless alignment of the file elements with each other is ensured.

Naturally, the file elements of a filing band ll may have very difierent cross-sectional shapes. Thus, Fig. 6 shows a file element l5a having a rectangular cross-section. Fig. 7 shows a similar file element IS!) in which, however, one narrow side has a semicircular shape, whilst, in the case of the file element I50 shown in Fig. 8, the two narrow sides have a semicircular shape. The file element l5d shown in Fig. 9 has a flat and round cross-sectional shape and the cross-sectional shape of the file element 156 shown in Fig. 10 corresponds to that of a sword file. Finally, Fig. 11 shows a file element 15] which has the cross-sectional shape of a cross file. Owing to the fact that the file elements are provided with filing teeth over their entire outer sides, so that not only one front side thereof can be used for treating a piece of work, and that filing bands having different cross-sectional shapes can be employed, the possibility of employment of this filing machine is very considerably increased.

The guide pulleys 5 and II) have a flange I! on one side of their rim l6 (Fig. 21). A band I8 is put on the rim I6 and is pushed up to the flange ll; this band 18 has a guiding groove the cross-sectional shape of which conforms to that of the file elements [5 of the filing band employed. The band I8 is kept on the rim l6 by means of an adjusting ring l9 which i held on the rim l6 by means of binding screws 2| which lie in slots 20 in the rim l6. Advantageously, the slots 20 in the rim are bent in the manner of a bayonet joint.

The file elements are fixed together on the steel band in such a manner that their inner edges rest well againsteach other even over the guide pulleys. Over the guide pulleys, the outer edges of the file elements are separated somewhat from each other, whilst, on the straight paths between the guide pulleys, the filing band forms a closed whole.

What I claim is: v

1. A filingmachine comprising two guide pulleys, a flange on one side of each of said guide pulleys, aband on each of said guide pulleys pushed up to said flange. a guiding groove in said band, an adjusting ring on the rim of each of said guide pulleys, binding screws fixing said adjusting ring to said rim, and an endless filing band consisting of a steel band, composed of at least one sheet, and file elements having slots strung on said steel band loosely but lying next to each other to form said filing band, said groove conforming to the cross-sectional shape of said file elements and said file elements fitting in said groove.

2. A filing machine comprising two guide pulleys, a flange on one side of each of said guide pulleys, a band on each of said guide pulleys pushed up to said flange, a guiding groove in said band, an adjusting ring on-the rim of each of said guide pulleys, binding screws fixing said adjusting ring to said rim, and an endless filing band consisting of a steel band, composed of at least one sheet, and file elements having slots strung on said steel band loosely but lying next to each other to form said filing band and completely embracing said steel band, said groove conforming to the cross-sectional shape of said file elements and said file elements fitting in said groove.

3. A filing machine comprising two guide pulleys and an endless filing band passing over said guide pulleys and consisting of a steel band, composed of at least one sheet, and file elements having slots strung on said steel band loosely but lying next to each other to form said filing band and open on one side.

4. A filing machine comprising two guide pulleys, a flange on one side of each of said guide pulleys, a band on each of said guide pulleys pushed up to said flange, a guiding groove in said band, an adjusting ring on the rim of each of said guide pulleys, binding screws fixing said adjusting ring to said rim, and an endless filing band consisting of a steel band, composed of at least one sheet, and file elements having slots strung on said steel band loosely but lying next to each other to form said filing band and open H on one side, said groove conforming to the crosssectional shape of said file elements and said file elements fitting in said groove.

5. A filing machine comprising two guide pulleys and an endless filing band passing over said guide pulleys and consisting of a steel band,

i- 7 composed of at least one sheet, and file elements having slots passing therethrough and strung by said slots on said steel band loosely but lying next to each other to form said filing band, said steel band being wider than said slots and lying curved in said slots, and the edges of said steel band lying in the corners of said slots and its arched middle part resting against the outer side of said slots.

6. A filing machine comprising two guide pulleys, a flange on one side of each of said guide pulleys, a band on each of said guide pulleys pushed up to said flange, a guiding groove in said band, an adjusting ring on the rim of each of said guide pulleys, binding screws fixing said adjusting ring to said rim, and an endless filing band consisting of a steel band, composed of at least one sheet, and file elements having slots passing therethrough and strung by said slots on said steel band loosely but lying next to each other to form said filing band, said groove conforming to the cross-sectional shape of said file elements, said file elements fitting in said groove, said steel band being wider than said slots and lying curved in said slots, and theedges of said steel band lying in the corners of said slots and its arched middle part resting against the outer side of said slots.

JOSEF 

